Fireproof device for main cable clamp of suspension bridge

Abstract

The utility model discloses a fire protection device for a main cable clamp of a suspension bridge, and relates to the field of cable clamp fire protection, the fire protection device comprises a main cable body, a suspender and a cable clamp body used for connecting the main cable body and the suspender, the cable clamp body comprises an upper clamping ring and a lower clamping ring, a fixing plate is fixedly arranged on the outer side of the lower clamping ring, and the fixing plate is fixedly connected with the suspender. The outer side of the lower clamping ring is movably provided with a fireproof protection plate, the upper end of the protection plate is fixedly provided with a plurality of storage shells, steel cables are fixedly arranged between the storage shells, and the other ends of the steel cables are fixedly connected with the lower end of a fixing plate. When the temperature in the air is high due to large fire behavior, the PET plastic is melted, the hook ring is disconnected, and the protection plate descends by a certain distance to isolate direct contact between the key connection position of the cable clamp body and the high temperature of the flame.

Description

Technical Field

[0001] The utility model relates to the field of cable clamp fire prevention, in particular to a fire prevention device for a main cable clamp of a suspension bridge. Background Art

[0002] A suspension bridge, also known as a suspension bridge, refers to a bridge that uses cables (or steel chains) suspended through towers and anchored on both banks (or both ends of the bridge) as the main load-bearing components of the upper structure. For cable system bridges, the cables are the main load-bearing components of the bridge. As the traffic flow on the bridge increases, the number of vehicles transporting flammable and explosive items on the bridge also increases. Once a fire occurs, traffic will be blocked and it will pose a great threat to the safety of the bridge. The cable clamp of the suspension bridge is an important component for fixing the main cable. It can bear huge tension, so that the cables can be tightly connected and maintain the stability and safety of the structure.

[0003] When a fire occurs on a suspension bridge, the high temperature of the flame will burn the bridge body, causing damage to the bridge body due to the high temperature, resulting in reduced strength of cables, etc., seriously affecting the service life of the suspension bridge and potential safety hazards, especially the key connectors such as suspension bridge cable clamps, which have low self-protection capabilities;

[0004] Therefore, it is necessary to propose a fire protection device for the main cable clamp of a suspension bridge to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a fire protection device for the main cable clamp of a suspension bridge to solve the problem that the cable clamp of the suspension bridge is damaged due to the high temperature of the flame, resulting in a reduction in the strength of the cable, etc., which seriously affects the service life of the suspension bridge and poses a safety hazard, and its own protection ability is relatively low.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fire prevention device for a main cable clamp of a suspension bridge, comprising a main cable body and a hanger and a cable clamp body for connecting the main cable body and the hanger, the cable clamp body comprising an upper clamp ring and a lower clamp ring, a fixed plate is fixedly arranged on the outer side of the lower clamp ring, a protective plate for fire prevention is movably arranged on the outer side of the lower clamp ring, a plurality of storage shells are fixedly arranged on the upper end of the protective plate, steel cables are fixedly arranged between the storage shells, and the other end of the steel cable is fixedly connected to the lower end of the fixed plate;

[0007] The corresponding ends of the fixing plate and the protection plate are fixedly provided with a plurality of hook rings, and a connecting ring is fixedly provided between two corresponding hook rings;

[0008] The hook ring is hollowed out in a convex shape.

[0009] Preferably, connecting blocks are fixedly provided at both ends of the upper clamp ring, a rotating plate is rotatably provided on the outer side of the connecting block, a clamping hole is opened in the middle of the rotating plate, and the rotating plate is sleeved on the outer side of the main cable body through the clamping hole.

[0010] Preferably, a rectangular groove for the suspension rod to pass through is provided at one end of the protection plate, and an arc surface is provided on the inner side of the rectangular groove.

[0011] Preferably, the clamping hole is arranged in an elliptical shape.

[0012] Preferably, the fixing plate and the protection plate are arranged at an incline.

[0013] Preferably, the main cable body is located between an upper clamp ring and a lower clamp ring and fixed by bolts, and the suspension rod is rotatably connected to the end of the lower clamp ring.

[0014] Technical effects and advantages of the utility model:

[0015] 1. The high temperature in the air during a fire is used to roast the PET plastic connection ring. When the temperature in the air is high due to the fire, the PET plastic is melted by the melting temperature, disconnecting the hook ring and lowering the protection plate by a certain distance to isolate the key connection position of the cable clamp body from direct contact with the high temperature of the flame, thereby preventing the high temperature from affecting its strength.

[0016] 2. Due to the melting characteristics of PET plastic, when the fire is small, the temperature spread is not enough to melt the PET plastic. Therefore, it will not affect the strength of the cable clips and other connectors, thus ensuring their use;

[0017] 3. Through the cooperation of the turning plate and the clamping hole, when the cable clamp body is loosened due to factors such as flame burning, the turning plate can be used to clamp and fix the main cable to prevent installation hazards caused by its movement to a large position. The turning plate and the clamping hole have simple structures and are easy to produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the structure of the fire protection device of the main cable clamp of the suspension bridge.

[0019] Figure 2 This is a structural schematic diagram of another viewing angle of the fire protection device of the main cable clamp of the suspension bridge of the utility model.

[0020] Figure 3 This is a schematic diagram of the expanded structure of the protection plate of the utility model.

[0021] Figure 4 This is a schematic diagram of the hook structure of the utility model.

[0022] In the figure: 1. Cable clamp body; 2. Main cable body; 3. Hanging rod; 4. Fixing plate; 5. Protective plate; 6. Storage shell; 7. Steel cable; 8. Hook; 9. Connecting ring; 10. Connecting block; 11. Turning plate; 12. Clamp hole; 13. Arc surface. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides Figure 1-Figure 4 The fire protection device of the main cable clamp of a suspension bridge shown in the figure comprises a main cable body 2 and a hanger 3 and a cable clamp body 1 for connecting the main cable body 2 and the hanger 3, the cable clamp body 1 comprises an upper clamp ring and a lower clamp ring, the main cable body 2 is fixed between the upper clamp ring and the lower clamp ring by bolts, the hanger 3 is rotatably connected to the end of the lower clamp ring, wherein the upper clamp ring and the lower clamp ring are commonly used in the prior art, and no further description is made again;

[0025] A fixed plate 4 is fixedly arranged on the outer side of the lower clamp ring, and a protective plate 5 for fire prevention is movably arranged on the outer side of the lower clamp ring. The protective plate 5 is a mineral wool board with good heat insulation and fire resistance.

[0026] The size of the protection plate 5 is set according to the size of the cable clamp body 1, so that when a fire occurs, the protection plate 5 can slow down the impact of the temperature in the flame on the cable clamp body 1. A plurality of storage shells 6 are fixedly arranged on the upper end of the protection plate 5, and steel cables 7 are fixedly arranged between the storage shells 6. The other end of the steel cables 7 is fixedly connected to the lower end of the fixing plate 4, and the length of the steel cables 7 is determined according to the height of the cable clamp body 1 from the bridge deck, so as to ensure effective isolation of flames and temperature.

[0027] The fixed plate 4 and the protective plate 5 are fixedly provided with multiple sets of hook rings 8 at one end corresponding to each other. The position and number of the hook rings 8 are set according to the size of the protective plate 5 to ensure the load-bearing capacity of the protective plate 5. A connecting ring 9 is fixedly provided between two corresponding hook rings 8. The connecting ring 9 is made of PET polyethylene terephthalate but is not limited to PET polyethylene terephthalate. The melting temperature of the connecting ring 9 is controlled according to the height and usage of the suspension bridge. PET polyethylene terephthalate has a melting point of 245°C. By increasing its melting point, when the fire is small, the temperature transmission is not enough to melt the PET plastic. Therefore, it will not affect the strength of the connecting parts such as the cable clamp, thereby preventing the connecting ring 9 from melting and ensuring its usage.

[0028] The hook ring 8 is hollowed out in a convex shape to ensure the passage of the connecting ring 9.

[0029] In the embodiment of the utility model, connecting blocks 10 are fixedly provided at both ends of the upper clamping ring, a rotating plate 11 is rotatably provided on the outer side of the connecting block 10, a clamping hole 12 is opened in the middle of the rotating plate 11, and the clamping hole 12 is elliptical. The rotating plate 11 is sleeved on the outer side of the main cable body 2 through the clamping hole 12.

[0030] In the embodiment of the utility model, a rectangular groove for the suspension rod 3 to pass through is provided at one end of the protection plate 5, and an arc surface 13 is provided on the inner side of the rectangular groove. The arc surface 13 contacts the surface of the suspension rod 3 to prevent the protection plate 5 from being stuck on the outer side of the suspension rod 3 when it is downward, causing incomplete movement of the protection plate 5.

[0031] In the embodiment of the utility model, the fixing plate 4 and the protection plate 5 are arranged at an angle to prevent rainwater from accumulating on the connection parts such as the suspension rod 3 and preventing the rainwater from corroding them.

[0032] Working principle: When a fire occurs, the fire conditions will be different because the items carried by the moving cars are different and the types of cars are different;

[0033] When the fire is small, when the temperature near the cable clamp body 1 is lower than 200°C, the connecting ring 9 will not be deformed or softened due to its material, so the connecting ring 9 will not be disconnected, and when the temperature near the cable clamp body 1 is lower than 200°C, the low temperature will not affect the metal cable clamp body 1 and other connecting parts, so that the connecting ring 9 can be used for a long time;

[0034] When the fire is large, when the temperature in the air is higher than the melting temperature of the connecting ring 9, the connecting ring 9 will gradually melt until it is disconnected, thereby disconnecting the two corresponding hook rings 8, thereby causing the protection plate 5 to move downward due to gravity, thereby causing the protection plate 5 to move away from the fixing plate 4, and connecting the protection plate 5 through the steel cable 7, thereby isolating the direct hot air flow at the lower end of the cable clamp body 1 through the protection plate 5, preventing the high temperature from causing high temperature damage to the cable clamp body 1 and other connecting parts, thereby reducing the temperature rise speed near the cable clamp body 1, and preventing the temperature from rising too fast during the fire extinguishing period, thereby causing permanent damage to the cable clamp body 1;

[0035] And by setting the rotating plate 11 and the clamping hole 12, the installation of the cable clamp body 1 can be secondary protected to prevent it from moving significantly. Through the shape of the clamping hole 12, the inner circles at both ends and the main cable body 2 are subjected to bidirectional force to form a limited force, which becomes tighter and tighter, greatly increasing the safe use of the cable clamp body 1.

Claims

1. A fire protection device for a main cable clamp of a suspension bridge, comprising a main cable body (2) and a hanger (3) and a cable clamp body (1) for connecting the main cable body (2) and the hanger (3), wherein the cable clamp body (1) comprises an upper clamp ring and a lower clamp ring, and is characterized in that: A fixing plate (4) is fixedly provided on the outer side of the lower clamping ring, a fire protection plate (5) is movably provided on the outer side of the lower clamping ring, a plurality of storage shells (6) are fixedly provided on the upper end of the protection plate (5), steel cables (7) are fixedly provided between the storage shells (6), and the other end of the steel cable (7) is fixedly connected to the lower end of the fixing plate (4); A plurality of groups of hook rings (8) are fixedly provided at corresponding ends of the fixing plate (4) and the protection plate (5), and a connecting ring (9) is fixedly provided between two corresponding hook rings (8); The hook ring (8) is arranged in a convex hollow shape.

2. The fire protection device for the main cable clamp of a suspension bridge according to claim 1, characterized in that: Both ends of the upper clamp ring are fixedly provided with connection blocks (10), a rotating plate (11) is rotatably provided on the outer side of the connection block (10), a clamping hole (12) is provided in the middle of the rotating plate (11), and the rotating plate (11) is sleeved on the outer side of the main cable body (2) through the clamping hole (12).

3. The fire protection device for the main cable clamp of a suspension bridge according to claim 1, characterized in that: A rectangular groove for the suspension rod (3) to pass through is provided at one end of the protection plate (5), and an arc surface (13) is provided on the inner side of the rectangular groove.

4. The fire protection device for the main cable clamp of a suspension bridge according to claim 2, characterized in that: The clamping hole (12) is arranged in an elliptical shape.

5. The fire protection device for the main cable clamp of a suspension bridge according to claim 1, characterized in that: The fixing plate (4) and the protection plate (5) are arranged in an inclined manner.

6. The fire protection device for the main cable clamp of a suspension bridge according to claim 1, characterized in that: The main cable body (2) is located between an upper clamp ring and a lower clamp ring and is fixed by bolts, and the suspension rod (3) is rotatably connected to the end of the lower clamp ring.

Images